Glaus van haagen



erate the ratchet-wheel, (see iigzd.)

iibtitt gaat 1 atodtttite;

TO HIMSELF AND ANTHONY VAN HAAGEN, OF SAME PLACE. I

Letters Patent No. 110,405, dated December 20, 1870.

IMPOVEMENT- IN PORTABLE DRILLINGTOOLS.

The Schedule referred to in these Letters Patent: and making part of the same.

I, CLAUS VAN HAAGEN, of Philadelphia, county of Philadelphia, State of Pennsylvania, have invented a .Portable Drilling-Tool, of vwhich the following is a speeilicat-ion.

.Nature and Object 0f the Invenion.

My invention consists of a portable drilling-tool, too fully described hereafter to need preliminary explanation, the tool being so constructed as to form a self-feeding boring implement, well adapted for general use in machine-shops, and especially in contracted spaces.

Description of tlte'dccompanying Drawiny. Figure 1 is a longitudinal section of my improved drilling-tool Figure 2, a sectional plan of the same, on the line L2, fig: l;

`Figure 3, a transverse vertical section-011 thc line Figure 4, a section on the line 5,-6, iig. 1 and Figure 5, an exterior view of part of the casing of the tool.

General Description. l

The tubular body or casing of the instrumcntconsists of two main portions, A and B, arranged at right angles to each other, the portion A having a detachable extension, A.

A spindle, D, is arranged tcturn in the portion A and extension A' of the casing, and has at its inner end a bevel-wheel, b,- gearing into a larger bevelwheel, b', of a short bottom spindle, F, the latter being arrangedto turn in the portion B of the casing, as will be more fully explained hereafter, and having a tapering socket, c, for the reception of the drill.

A ratchet-wheel, H, is Screwed onto the end c oi' the spindle D, and is contained within the recessed enlargement fof a sleeve, J,'which is adapted to and arranged to turn freely upon the extension A' of the easing, and within the same recessed enlargement of the sleeve is also contained the crank or arln K, by which the drill is operated.

This arm is hung to a pin, i, on the sleeve, and is permitted to have a suiiicient vibrating motion upon the said pin to enable its pawl-like short arm to op- .lhc tapering end of the drill, carrying spindle F, fits intol and turns in the recessed end of a spindle. L, which is also arranged to turn in the portion B ol' the body of the easing.

This spindle L has a threaded recess extending almost entirely through it, to which recess is adapted a screw-rod, M, furnished at its outer extremity with a suitable head, on which are two or more teeth or projections, l, intended to be forced against any fixed object opposite to the point where the hole has` to be bored by the drill.

Upon the tubular spindle L is formed a worn1- wheel, q', to which is adapt-ed a worm, q, on a spindle, N, which receives its motion through the medium of cog-gearing r from the spindle l).

This worm and wheel, together with the spindle L and serewrod M, constitute an automatic feed for the cutting-tool, and form au important feature of my invention.

In using the'above-described tool, the point of the drill is adjusted to the desired position upon the object in which it is required to bore a hole, and the points l Z of the feed-screw M are forced into or against any fixed object which will afford a bearing or abutment for and prevent the said screw from turning. Y

The operator then steadies the instrument with one hand, while with the other he manipulates the crank or lever K, turning the same completely around in the direction ofthe arrow, iig. 4, if there are no obstacles in the way to prevent such free motion, or,

' if the work has to be performed in a contracted situation, the handle is merely reciprocated, so as to operate the ratchet-wheel. lhe result, however, will, in both cases, be the same, namely, a rotation ofthe spindle D and automatic feeding of the same, until a hole -of the desired depth has been bored bythe drill. 1

In order to withdraw-the tool lfrom the hole which it has drilled, it will be only necessary to reverse the motion of the crank until the feed-screw has been drawn back into the spindle L.

The peculiar form of the instrument enables it to be used in contracted situations with much greater facility than the ordinary straight ratchet-drill.

It has also the great advantage oventhe latter oi' being'fed l:nitonnrtieally and regularly, instead of at irregular intervals and by hand, as usual.

The uniformity of the feed also enables twist or spiral drills to be employed with much less risk of breaking than in ordinary ratchet-drills.

Witnesses:

Wn. A. Srnnn, F. B. RionAnDs. 

